You'll want these:Russian Federation Units 2.0 by RHS
. Also contains a pretty kickass pack of weapons (don't know how the recoils behave though in post 1.08, but you can always use vanilla weapons too I guess). They belong to the "pre-tools" genre of addons, meaning they're really just retextured vanilla units : but the textures are pretty bad-assed, so there's nothing to be ashamed of there. Also Shadow NX keeps threatening to produce a new version, so there's even a slight chance of them getting upgraded sometime along...
There are SOME other russian units around (notably in CWR, but that would require a Total Conversion mod), but I think the above are just about the best